On the National Register of Historic Places, this 280-acre bay-side island is the site of a virgin hardwood forest and the 1919 home of chemical magnate William Matheson. His caretaker's cottage serves as the park's visitor center. Access is by boat—your own, a rented vessel, or a tour operated from Robbie's Marina. The tour leaves at 8:30 am Friday through Sunday and takes in both Lignumvitae and Indian keys (reservations required). Paddling here from Indian Key Fill,
at MM 78.5, is a popular pastime. The only way to do the trails is by a guided ranger walk, offered at 10 am and 2 pm Friday to Sunday. Wear long sleeves and pants, and bring mosquito repellent. On the first Saturday in December is the Lignumvitae Christmas Celebration, when the historic home is decorated 1930s-style.
Islamorada, Florida, United States
305-664–2540-park; 305-664–8070-boat tours